When the passive leaf is closed, automatic locking of the spring-loaded vertical rods at the top and bottom is triggered by passive-leaf control lock B 1895. Now the passive leaf is locked. When unlocking, the vertical rods are retracted into the passive leaf by operating the panic push bar which simultaneously pushes the automatic latch into the lock of the active leaf. When the opening movement of the hardware is completed, the vertical rod is automatically locked in place within the control lock. As they are steplessly arrested as long as the passive leaf is open, the vertical rods are prevented from projecting so the floor will not be damaged. Moreover, the (automatic) closing movement of the door leaf is not obstructed.